3Leydesdorff, Loet. The Measurement and Evaluation of Triple Helix Relations among Universities, Industries, and Governments[ C]. Paper to be Presented at the Fourth International Triple Helix Conference. Copenhagen. November 2002.
4Leydesdorff, Loet & Etzkowitz, Henry. The Dynamics of Innovation: From National Systems and "Mode 2" to a Triple Helix of University - Industry - Government Relations[J]. Research Policy29 (2000). 109 - 123,111 - 112.
7Loet Leydesdorff.Knowledge-Based Innovation Systems and the Model of a Triple Helix of Uni-versity-Industry-Government Relations.Research Policy,2000,29 (2):109-123.